which acting on the color and spin space of quarks can read [1]}, [2]}, [3]}, [4]}, [5]}, [6]}. And the chromoelectric interaction term is:
\(H_{\text{ce}}=-\sum \limits _{i<j}c_{ij}{\lambda }_{i}^{c}\cdot {\lambda }_{j}^{c}.\) 
